单选题长期使用广谱抗生素的病人体检时常发现

单选题A．清蛋白B．Tamm-Horsfall蛋白C．血红蛋白D．免疫球蛋白

单选题 烟草中具有成瘾性的主要物质是（ ） A、烟焦油 B、苯并花 C、尼古丁 D、一氧化碳

单选题甲状腺I度肿大是指

单选题 挑刺试验本卡针与皮肤呈什么角度进针点刺 A、15° B、30° C、45° D、60° E、90°

单选题 Percoll分离液法常用来分离 A、红细胞 B、白细胞 C、单个核细胞 D、单核细胞和淋巴细胞 E、T细胞和B细胞

单选题In 1993, I published a book, The Rage of a Privileged Class, whose central thesis was that even the most gifted African-Americans assumed that they would never crash through America's glass ceiling—no matter how talented, well educated, or hardworking they were. Few people of any race would claim that true equality has arrived; but so much has changed since Rage came out. Color is becoming less and less a burden; race is less and less an immovable barrier. My new research explores how that phenomenon is changing the way people of all races view the American landscape. I polled two groups of especially accomplished people of color. One is the African-American alumni of Harvard Business School. The other is the alumni of A Better Chance, a program, founded in 1963, that sends ambitious, talented youngsters to some of the nation's best secondary schools. Generations, I concluded from my study, mattered deeply—with their defining characteristics rooted in America's evolving racial dynamics. Generation 1, in this categorization, is the civil-rights generation—those (born before 1945) who participated in, or simply bore witness to, the defining 20th-century battle for racial equality. It is the generation of whites who, in large measure, saw blacks as alien beings and the generation of blacks who, for the most part, saw whites as irremediably prejudiced. Gen 2s (born between 1945 and 1969) were much less racially constrained—though they remained, in large measure, stuck in a tangle of racial stereotypes. Gen 3s (born between 1970 and 1995) saw race as less of a big deal. And that ability to see a person beyond color has cleared the way for a generation of Believers—blacks who fully accept that America means what it says when it promises to give them a shot. That new reality made itself clear when I compared black Gen 1 Harvard M. B. A. s with their Gen 3 counterparts. Seventy-five percent of Gen 1s said blacks faced "a lot" of discrimination, compared with 49 percent of Gen 3s. Twenty-five percent of Gen 1s thought their educational attainments put them "on an equal professional footing with white peers or competitors with comparable educational credentials," compared with 62 percent of Gen 3s. Ninety-three percent of Gen 1s saw a glass ceiling at their current workplaces, compared with 46 percent of Gen 3s. I am not about to make a statistical argument based on these numbers, but the message nonetheless seems clear. In the time since the Gen 1s came on the scene, a revolution has occurred. Those uptight suburbanites who couldn't imagine socializing with, working for, or marrying a "Negro," who thought blacks existed in an altogether different dimension, who could no more see dining with a black person than dining with a giraffe, have slowly given way to a new generation that embraces—at least consciously—the concept of equality. Americans have, in some substantial way, re-created each other—to an extent that our predecessors might find astounding.

单选题 B、细胞能识别特异性抗原，因其表面有 A、 Fc受体 B、 C3受体 C、 IPS受体 D、 E受体 E、SmIg

单选题在人B淋巴细胞膜上的最具特征性的受体是

单选题Of these five chromsomal abnormalities, which is associated with AML-M2b？

单选题腹部体检时振水音阳性见于

单选题 新月体形肾炎时尿中哪种细胞增多 A、单核细胞 B、淋巴细胞 C、闪光细胞 D、嗜酸性粒细胞 E、大圆上皮细胞

单选题A．闭目难立征B．Gordon征C．Brudzinski征D．Romberg征

单选题 等密度区带离心法对样品进行分离和纯化主要是利用不同的（ ） A、质量 B、密度 C、沉降系数 D、体积 E、分子大小

单选题 危急值指的是 A、急诊患者检测结果 B、医学决定水平 C、异常结果 D、危重患者抢救时检测结果 E、一些检测项目的测定值过高、过低时可能危及患者生命的值

单选题 下列有关自身免疫性疾病共同特征，说法错误的是 A、有遗传倾向 B、患者以女性居多 C、疾病重叠现象 D、一般发病急，病程短 E、免疫抑制剂治疗有效

单选题 使用高效液相色谱仪分离复杂样品，常液系脱分离效果不好时，最常用的改善分离方法是（ ） A、程序升温 B、程序变流速 C、组合柱 D、梯度洗脱 E、均不对

单选题A．呕血伴节律性上腹痛B．呕血伴脾肿大C．呕血伴右上腹痛、黄疽、发热D．呕血伴皮肤黏膜出血E．剧烈呕吐后继而呕血

单选题 CLLA′88的技术细则规定满意S1、S2均应大于( ) A、60 B、70 C、80 D、90 E、100

单选题颈部淋巴结长大见于： 　①口腔炎症　　　②结核　　　③肺癌　　　④鼻咽癌